The Oura Ring 5 in Silver, Size 9 is an all-titanium smart ring with Smart Sensing — tracking sleep, HRV, blood oxygen, temperature, and stress, with 6–9 days of battery life depending on usage. 6–9 days of battery, no screens, no buzz. Smart Sensing adapts to your finger for accurate, all-day readings Pairs with the Oura app on iOS or Android. First month of membership included; $7.99/mo after This description was generated by AI and reviewed for accuracy.